Typewriting and accounting machine



June 6, 1944.

o. J. sUNDsTRAND TYPEWRITING AND ACCOUNTING MACHINE Filed June 29, 1940 3 Sheets-Shea?l l INVENTOR OSCAR J SUNDSTRAND June 6, 1944.

O. J. SUNDSTRAND TYPEWRITING AND` ACCOUNTING MACHINE Filed June29, 1940 3 Sheets-Sheet 2 mvENToR OSCAR J SUNDSTRND ATTORNEY June 6, 1944. o. J. suNDs'TRAND 2,350,542

TYPEWRITING AND ACCOUNTNG MACHINE Filed June 29, 1940 3 Sheets-Sheet 5 y OSCARJSUNDSTRND #6m/6 ATTORNEY Patented June 6, 1944 UNITED STATES PATENT OFFICE TYPENRITING AND ACCOUNTING MACHINE Application June 29, 1940, Serial N0. 343,233

(Cl. 23S-59) 15 Claims.

lThis invention relates to accounting machines and to typewriting and accounting machines and more particularly to combined typewriting and accounting machines of the type in which numbers are set up denomination by denomination in the registers or totalizers and are printed digit by digit under control of the numeral keys of the typewriting mechanism.

In the machine shown and described in applicants pending application Serial No. 281,772, filed June 9, i939, the differential actuating mechanism is driven in one direction by power and the return movements are imparted thereto by spring actuated means. The said differential mechanism is engaged or connected with the register operating mechanism during the return movements of the differential mechanism and during these movements the registers are operated to enter the required numbers therein.

The primary object of the present invention is to provide machines of the above character with an improved diiferential actuating mechanism for the registers in which said mechanism is driven in a return direction always at substantially the same speed during the greater part of the period in which it is engaged or connected with the register operating mechanism.

With the above object in View, in the present machine, the differential mechanism is provided with means for driving the same positively by power during the greater part of each return movement of said mechanism.

The above and other features of the invention will be clearly understood from the accompanying drawings illustrating a machine embodying the invention in its preferred form and the following detailed description of the construction therein shown.

In the drawings:

Fig. 1 is a view in vertical section of the machine and illustrating particularly the type bar operating mechanism and the differential mechanism for operating the registers or totalizers to enter the numerals from 3 to 9 inclusive therein,

Fig. 2 is a detail View in side elevation looking from the left hand side of the machine and illustrating particularly certain parts of the driving mechanism,

Fig. 3 is a detail view partly in side elevation and partly in section with certain parts broken away, looking from the right hand side of the machine, and illustrating particularly the mechanism for imparting the return movement to the diierential actuators,

Fig. 4 is a View similar to Fig. 3 except that the supporting frame plate is removed and indicated in dot and dash lines, certain of the parts being shown in different positions in this gure iro-m the positions in which they are shown in Fig. 3,

ig. 5 is a View similar to Fig. 4 illustrating certain of the parts in different positions,

Fig. 6 is a plan View of the mechanism shown in Fig. 3,

Fig. 7 is a detail view in side elevation, illustrating certain parts of the mechanism for imparting the return movement to the differential actuators,

Fig. 8 is a detail view in side elevation illustrating, in different positions, certain of the parts shown in Fig. 7,

Fig. 9 is a detail view in rear elevation illustrating certain of the parts shown in Figs. 3 to 6 inclusive, and

Fig. 10 is a detail View, partly in front elevation and partly in section, illustrating particularly certain of the parts shown in Fig. 3.

The machine illustrated in this application, except for the differential actuating mechanism for the registers and certain parts of the driving mechanism, has substantially the same construction, arrangement andr mode of operation of parts as the machine illustrated and described in applicants application Serial No. 281,772, referred to above.

In the illustrated construction, the machine comprises a platen frame provided with side rails or bars 2 connected together in spaced relation by cross bars (not shown) and a substanf tially dat platen 4 mounted for vertical movement in said frame. Upon the side rails of the platen frame is supported a line space frame movable forwardly and rearwardly on tracks formed upon the upper edges of said rails to line space theA type carriage with relation to the platen. The line space frame comprises side brackets or bars, one of which is indicated at 6, connected .by front and rear rails, of which the rear rail is indicated at 8.

Upon the line space frame is mounted a type carriage or head indicated as a Whole at l0 upon which are mounted the usual series of type bars, each carrying one or more types for engaging the work sheets supported on the platen. The type bars are arranged to be operated by power driven mechanism in the present machine and this mechanism is in part carried by the carriage. The carriage also carries the usual series of keys forming the keyboard of the machine and controlling the coaction of the type bars with the power driven mechanism. The carriage also carries a master wheel by which the totalizers or registers are driven and mechanism for driving the master wheel differentially by power to set up or enter successively the various digits of a number step by step in the register.

The type carriage is mounted for movement forwardly and rearwardly with the line space frame and is also mounted for lateral movement on said frame in a right hand direction to letter space during a typing operation and for return movement in a left hand direction to restore the carriage to position for starting the typing of a line. The carriage is provided with front and rear wheels or rollers arranged to engage respectively the front and rear rails of the line space frame. One of the rear rollers is indicated at il in Fig. 1. The carriage is acted upon by the usual metallic band having one end attached to the carriage and connected with the usual spring drum which tends yieldingly to move the carriage constantly in a right hand direction along the rails of the line space frame. These elements are not shown in this application but are illustrated and described in application Serial No. 281,772, referred to above. The letter spacing movement of the carriage is'controlled by the usual escapement mechanism indicated at l2.

Each of the type bar mechanisms comprises a type lever I3, an intermediate lever I4 and a series of links and levers I5, I6, VI'l, I8 and I9 connecting the intermediate lever with the type bar through which the type bar is actuated to engage the type with the work sheet on the platen upon the downward movement of the intermediate lever. The power mechanism for actuating the intermediate lever comprises a longitudinally movable transmitting link 2E, a radius arm 2l, a longitudinally movable driving link 22, a pawl 23 movably mounted on said driving link and -a `continuously rotating toothed or fluted shaft 24 arranged to be engaged by said pawl. The driving link is swung laterally to engage the pawl with the fluted shaft by means of a drag-link 26 connected with a key lever 28.

' The machine illustrated is provided with a register 3i] mounted at the rear of the machine upon -a register bar 32 mounted on the line-space frame, said register bein-g provided with totalizer wheels 34.

The type carriage is provided with power driven mechanism for actuating the totalizer wheels of the column registers to set up numbers in said wheels. numeral keys of the typewriter keyboard. This mechanism comprises a master wheel 3B located at about the middle of the type carriage atthe rear thereof and extending rearwardly from the carriage into position to engage the lower set of wheels of the totalizer mechanism. The master wheel is fixed to a shaft journaled in the carriage and is connected by suitable gearing with the This mechanism is controlled by the f main differential actuator shaft 38 extendingv sponding numeral type bar actuating mechanisms respectively. The several mechanisms for differentially rotating the shaft under control of the numeral keys from 3 to 9 inclusive, to enter corresponding numbers in the register, all have the same general construction, arrangement and mode of operation of parts, these mechanisms differing only in the respects hereinafter pointed out, to vary the rotative movement imparted to the shaft.

Each of these mechanisms (see Fig. l) comprises a longitudinally movable rack bar 4B, pivotally suspended at 42 on an arm 4Q which is pivoted on a shaft it extending across the type carriage. These arms are acted upon by a bail 48 also pivoted on said shaft and engaging the upper sides of the arms as shown in Fig. 1. The bail is acted upon by a spring E (see Fig. 3) which tends to swing the bail downwardly and normally holds the bail in depressed position. This spring has suicient strength to swin-g the bail downwardly when the bail is not connected Vto actuate the register operating shaft 38 but,

preferably, has not sufficient strength to overcome the resistance of said shaft, the register operating mechanism between said shaft and the totalizer and that of the totalizer itself. The downward movement of the bail is adjustably limited by a stop lever 52 (see Fig. 3) pivoted at -54 on one of the side plates 56 of the frame of the type carriage and held in adjusted position by means of a screw 58 engaging in a slot 60 in the'lever.

Each of the racks 40 is provided, on the rear side thereof, with a series of downwardly inclined teeth arranged to engage the teeth of a gear 62, fixed to the shaft 38, the teeth ofthe gear being inclined in a clockwise direction, Fig. 1. Each of the rack bars is also provided on its forward side With a series of downwardly inclined teeth arranged to engage the teeth of a continuously rotating power driven toothed or iiuted shaft 64 extending across the type carriage and journaled in bearings carried by the side plates 56.

Each of the rack bars is normally held in a position intermediate between the shaft lfill and the corresponding gear 62 as shown in Fig. 1, in which it is disengaged from both shaft; and gear. The mechanism for holding each rack in this position comprises `a pin 6'6 secured in the bar adjacent the lower end thereof and engaging in a recess in a lever 68 pivoted at 'l0 on an upright supporting plate or bracket 72 secured to the cover plate 14. This lever is acted upon by a coil spring 'i6V which tends to swing the lever upwardly and yieldingly holds the pin engaged in the recess with the pin in contact or substantially in contact with the loweredge of a fixed cam plate 18 attached to the upright'plate l2.

In order to throw into operation the differential mechanism for entering a given digit in the totalizer of a register, the rack bar 4D corresponding to this digit is swung forwardly to engage the 'teeth on the forward side of the rack bar with the teeth of the continuously rotating shaft U54. -By the engagement of the rackbar with the shaft, the rack bar is moved longitudinally upward and the corresponding arm 44 and the bail y1118 are swung upwardly by the movement of the rack bar against the action of the spring 50. When the rack bar has been moved upward the distance required for the subsequent action thereof, it is swung rearwardly to disengage the teeth on the forward side'thereof from theshaft 64,

this movement being limited to prevent the ensagement of the teeth on the rear side thereof at this time with the gear 62. The rack bar is then moved longitudinally downward by the action of the bail 48 to a constant position, which is substantially the same for all of the several bars. At a predetermined point in the downward movement of the rack bar, the bar is swung farther to the rear to engage the teeth on the rear side of the bar with the gear 62, and, during the continued downward movement of the bar, the gear is rotated to actuate the totalizer to enter the corresponding digit in the register.

The several mechanisms for swinging the rack bars forwardly to engage said bars selectively with the continuously rotating shaft 64 are operated from the several corresponding intermediate levers |4 connected with the numeral type bars as these levers are moved downward respectively to actuate the type bars corresponding to the numeral keys. These mechanisms, however, are rendered operative only when the master wheel 62 is in position to engage and actuate one of the wheels of the totalizer mechanism of a register. The position of the type carriage when the master wheel is in position to operate the totalizer mechanism of a register, will be, in certain instances, hereinafter referred to as the position of the carriage, when in the zone oi' a register.

The mechanism for swinging each of the rack bars forwardly comprises a lever 80 (one for each rack bar) pivotally suspended at 82 upon an arm 84 secured to a rock-shaft 86 extending across the type carriage and supported in bearings in the end plates thereof. The lever 80 projects at its lower end through a guide slot in the cover plate 14 and is formed on its left hand side, Fig. l, with a projection 88 arranged to engage the pin 66. The rock-shaft 86 is acted upon by a coil spring attached to an arm on said shaft (not shown) which normally maintains the arm 84 and the lever 80 in lowered position with the projection 88 below the pin 66. The lever 80 is connected by a link 94 with a plate fixed to the upper end of an arm 96 secured to one of the intermediate levers |4 The levers 80, when the carriage is not in the zone of a register, occupy their lowered positions as shown in Fig. l. The machine is provided with the usual state control device and register engaging cam mechanism for controlling the actuation of the totalizer mechanism of a register from the differential mechanism when in the zone of a register, both of which are shown and described in applicants application Serial No. 281,772. With the state control device adjusted in write or total positions, the levers 80 will occupy their normal lowered positions, when the carriage is in the Zone of a register. With the state control device adjusted in compute position, when the carriage is in the zone of a register, the levers 80 is's'uine elevated positions to locate the projections 88 opposite the pins 66.

viilitl'i'this construction, when the lever |4 of a numeral type bar mechanism is swung downwardly to actuate the type bar, the corresponding lever 80 is swung forwardly through its connection with the arm 96. If the lever 80 is, at this time, in lowered position, the projection 88 thereon will not engage the pin 66 and this movement of the lever l80 will not affect the position of the rack bar. However, if the lever 80 is then in elevated position, the projection 88 on the lever will engage the pin 66 lon the rack bar, as said lever is swung 75 forwardly, and the rack bar will be swung forwardly therewith to engage the same with the continuously rotating shaft 64.

When the rack bar is engaged with the shaft 64, the bar is moved upwardly by the action of the shaft for the distance required for its subsequent action and is then swung rearwardly to disengage the same from the shaft by means of a pin 98 projecting downwardly from a supporting plate |00 secured to the frame of the carriage, which pin engages a laterally projecting arm |02 on the rack bar.

During the lateral swinging movement of the rack bar forwardly to engage the same with the shaft 64, the pin 66 travels along the lower edge of the fixed cam plate 18. During the upward movement of the rack bar, the pin travels along the forward edge of the cam plate which is shaped as shown in Fig. l and tends to guide the lower end of the rack bar and prevent it from disengaging the continuously rotating shaft. As the rack bar approaches the upper end of its movement, the pin 66 leaves the upper end of the cam plate. As the rack bar is swung rearwardly by the action of the pin 98, the pin 66 engages the forward side of a fixed guide plate |04 secured to the upright supporting plate l2 above the cam plate 18 and arranged to leave a crossover or channel |06 between the lower edge of the same and the upper edge of said cam plate. This plate |04 limits the rearward movement of the rack bar to prevent, at that time in the cycle, the engagement of the rack with the gear 62, and forms a guide for the lower end thereof during the rst part of the downward movement of the bar.

During the first part of the downward movement of the rack bar, under the action of the bail 48, the pin 66 moves along the forward Vside of the guide plate |04 until it reaches the channel |06, the rack bar then being disengaged from the gear 62. As the pin reaches the channel, which occurs at a predetermined point in the down` ward movement of the rack bar, said pin isdirected into said channel by the cam plate 'I8 which projects to the left some distance beyond the guide plate |04 as shown in Fig. l. The channel |06 is inclined downwardly and to the right (Fig. l) and, during the passage of the pin 66 through the same, the rack bar is swung rearwardly by the action of the cam plate 18, thereby engaging the rack bar with the gear 62 at a predetermined point in the downward movement of the rack bar.

During the continued downward movement of the bar under the action of the bail 48, the gear 62 is actuated to accumulate the number, corre sponding to the numeral key depressed, in the number wheels of the totalizer mechanism of the column register. After the rack bar 40 is engaged with the gear 62, and the rack bar continues its downward movement, the pin 6 6 engages the rear edge of the cam plate 'I8 which forms a guide for the rack and, at substantially the end of the downward movement of the rack, the pin engages the projecting end of the lever 68. By the engagement of the pin with the lever, the lever is swung downwardly slightly and the pin is deflected forwardly into the recess in the lever by the contacting edge of the lever which is inclined to a slight degree to the direction of downward movement of the pin, thereby again locating the rack bar in its intermediate position.

The cam plate 18 and the guide plate |04 differ in size and contour for each of the several actuator racks. The position of the channel |06 or the position of the upper inclined edge ofthe cam plate 'I8 determines the point in the downward movement of the rack bar at which the rack bar is engaged with the gear 62 to actuate the totalizer mechanism and this determines the extent of actuation of said mechanism and the number which is entered therein.

The mechanism for actuating the gears 62 corresponding to the actuator racks for the numeral keys 1 and 2, differs in certain respects from the corresponding mechanisms for actuating the gears 62 for the numeral keys from 3 to 9, inclusive, and has substantially the,` same construction and mode of operation as the corresponding mechanism shown and describedin application Serial No. 281,772. In each of these mechanisms each rack 40 is disengaged from the uted shaft 64 ata predetermined point in the upward movement of the rack differing in the case of each rack, and the corresponding gear 62 is actuated shortly after the beginning of the downward movement of the rack, the bail having a slight amount of lost motion, constant in eX- tent, at the start of its downward movement. Thus, the differential movement of the respective racks is produced by disengaging the rack from the fluted shaft 64 with the racks in differential positions. In this case also, the upward movement of the racks is produced by the rotation of the fluted shaft 64 and the downward movement is produced by the downward movement of the bail 43 as in the case of the racks for entering the numbers from 3 to 9 inclusive. The mechanism for entering the numbers l and 2, except for the provision of a slight amount of lost motion at the beginning of the downward movementV of the bail, is fully illustrated and described in applicants application Serial No. 281,772 and therefore need not be further de- Y scribed herein.

lAs far as described, the various mechanisms of thepresent machine have'substantially the same construction, arrangement and mode of operation as the correspondingv mechanisms illustrated and described in applicants application Serial No. 281,772. Except for the mechanism for imparting the return movements to the differential actuator racks, these racks and their actuating andvcontrolling mechanisms have substantially the same construction and mode of operation as in the differential mechanisms of the machine shown and described in said application. In order to insure a luniform and reliable action of the differential mechanism under varying conditions, mechanism is provided for lcausing the bail 43 to be actuated at a substantially uniform speed during the greater part of its return movement to operate the actuator racks, regardless of the load or the periodof operative action of the dierential mechanism. This mechanism is preferably constructed to actuate positively the bail during the greater part of its movement in a return direction.

In the present construction, upon the release ofl each differential rack bar from the uted shaftl, 'the downward movement of the bail 48 is initiated by the spring 5|). VThe initial downward movement of the bail throws into operation a power mechanism for moving positively the bail downwardly. The bail is positively driven downwardly by power until it approaches or is adjacent the end of its downward movement. The power mechanism is then -thrown out and an auxiliary,` Vspringoperated mechanism goes into action and imparts the final downward movement to the bail.

The power mechanism for moving the bail downwardly comprises two pawls |08 and pivoted on a screw stud V| I2 secured in a supporting block ||4 attached by screws ||5 to the under side of the bail 48, said'pawls being separated by a suitable Yspacing disk or washer. These pawls are respectively formed with teeth I I6 and I8, arranged to engage the teeth |20, of a roll |22 (see Fig. 10), rotatably mounted on the shaft 38 and having a projecting boss |23 formed thereon. The roll |22 is held in place longitudinally of the shaft 38A by means of sleeves |28 and |30 mounted on the shaft. The sleeve |28 is interposed between the boss |23 on the roll and a collar |32 xed to the shaft and the sleeve |30 is interposed between the roll and a bearing member |34 for the shaft fixed to a supporting plate |36 forming part of the frame. The roll |22 is driven continuously in the direction of the arrows, Figs. 3, 4 and 5 during the operation of the machine. The teeth on the two pawls are arranged in relatively staggered relation as shown in Figs. 3, 4 and 5, so that one or the other of the sets of teeth will be operatively engaged by the teeth of the roll immediately upon swing-- ing the pawls into position to engage the teeth of the roll. Thus if, upon swinging the pawls into position to engage the roll, the end of a tooth on the roll engages the end of a toothon one of Ythe pawls, the toothed end of thepawl will be swung back about the stud I I2 and the succeeding tooth on the other pawl will be en-Y gaged by said tooth on the roll. l

The pawls are controlled so that, when the bail 48 is in lowered position, the pawls are held out of engagement with the roll |22 as shown in Fig. 3. Also during the upward movement of the bail produced by the upward movement of a different actuator rack, the pawls are held out of engagement with the roll |22 as shown in Fig. 5. As the bail starts its downward movement under the influence ofthe spring 50, the pawls are swung about the stud ||2 intoengagement with the roll as shown in Fig. 4. The bail is then driven downwardly by the engagement of the teeth of the roll with the teeth of oneV of the pawls until the bail is adjacent the end of its downward movement. When the bail reaches this position, the pawls are swung about the stud I I2 to disengage the same from the roll |22 and an auxiliary spring actuated device is thrown into action in order to impart the final downward movement to the bail. l

The devices for controlling the angular position of the pawls |08 and about thestud I|2 include two independently operating friction devices. One of these friction devices comprises an arm |38 pivoted upon a stud I4Il fixed in and projecting laterally from a supporting plate'l42 securedin spaced relation to the side'k plate 5,6 by means of studs |46 and |48. To the forward end of arm |33 is fixed a pin |5I| which engages ina slot |52 formed in the forwardly projecting armA of the pawl |38.VY Themechanism for contion plates are held in yielding frictional contact with the arms by means of a coiled spring |64 mounted upon the stud |40 and interposed between the supporting plate v|42 and the adjacent retaining plate |62. The friction and retaining plates |88 and |62 are held from turning on the stud |40 by means of a pin |66 secured in supporting plate |42 and engaging in slots formed respectively in downwardly projecting arms on said friction and retaining plates (see Fig. 9).

When the bail 48 is in lowered position, the pawls |08 and ||0 are held out of engagement with the toothed roll |22 as shown in Fig. 3. When the bail is moved upwardly by the upward movement of one of the actuator racks 40, the frictional action of the friction plates |68 on the controlling arms |54 and |38 retards the movement of said arms which act on pawls |08 and ||0 through the pins |50 and |58. The retarding action on the forward arms of the pawls exerted by these pins, holds the pawls out of engagement with the toothed roll |22 during the entire upward movement of the bail as shown in Fig. 5. As the bail starts downwardly under the influence of the spring 50, the friction plates |60 again retard the movement of the arms |54 and |38 and these arms retard the movement of the forwardly projecting arms of the pawls. By this retarding action, the pawls are swung about the stud ||2 in a clockwise direction, Fig. 4, substantially to the positions shown in said gure. The teeth on one or the other of the pawls are then engaged by the teeth on the roll |22 and the bail is positively driven downwardly nearly into its final lowered position. When the bail reaches a. point adjacent its limiting lowered position, the pawls are both positively swung in a counter-clockwise direction (Figs. 3, 4 and 5) about the stud ||2 to disengage the same from the roll |22.

The mechanism for swinging the pawls about vthe stud |2 to disengage the pawls from the roll |22 comprises a contact plate |68 secured to an extension 88, Figs. 2 and 6, on the bail and having forwardly projecting fingers |70 and |12 for engaging respectively the upwardly projecting bumps |14 and |16 von the controlling arms |54 and |38 respectively.- As the pawls |08 and H0 are driven downwardly by the action of the I toothed roll |22 and the bail 48 is swung downwardly therewith, the arms |10 and |12 approach the bumps |14 and |16 on the controlling arms |54 and |38 and, just before the bar reaches its limiting downward position, said arms |10 and |12 engage the bumps and the pawls are then swung by said arms in acounterclockwise direction, Figs. 3, 4 and 5, to disengage the pawls from `the toothed roll.

The two pawls are employed to prevent misoperation in the event that the end of a tooth of the toothed roll engages the end of the tooth of one of the pawls as said pawls are initially engaged with the roll. When this occurs, the pawl which is engaged by the roll is thrust back about the axis of the stud ||2 by this end to end tooth engagement and, if only one pawl were employed, the pawl might miss several teeth on the disk or some other misoperation might result. In the present construction, if the end of a tooth of the roll engages the end of a tooth of one of the pawls, when the pawls are first thrown into operation, this pawl will be thrown back as shown in Fig. 4, for example. There will be no misoperation, however, for the tooth on the roll will almost immediately engage the succeeding tooth on the other pawl and the bail will then be driven downwardly by the engagement of the roll with this pawl.

In order to insure a uniform final movement of the bail to a constant downward position, an auxiliary spring actuated lever is provided for imparting the final downward movement to the bail. This lever, indicated at |18 in Figs. 7 and 8, is pivoted at |80 on one of the side plates '56 and is provided with a forwardly extending projection |82 at the end of one arm arranged to engage a roll |84 mounted on the bail. The lever is acted upon by a coiled spring |86 which tends to swing the same in a counter-clockwise direction, Figs. '1 and 8. The projection |82 is formed with an edge |88 which is engaged by the roll |84 during the greater part of the downward movement of the bail. This edge is so formed that, when the roll is engaged therewith, as shown in Fig. '1, the lever |18, under the action of the spring |86, exerts only a slight tendency to depress the bail. The projection is formed with a cam edge |80 which is engaged by the roll adjacent the end of the downward movement of the bail as shown in Fig. 8. By the engagement of this cam edge with the roll, the lever forces the bail with considerable force down to its final lowered position and holds it there. The cam edge is engaged by the roll, preferably just before the pawls are disengaged from the toothed roll so that the bail executes its final movement under the cam action exerted by the lever |18 under the inuence of the spring |86. Fig. 8 shows, in dot and dash lines, the final positions of the bail and the lever |18 at the end of the downward movement of the bail, the lever being indicated at |1811.

With the present construction, the bail for actuating the differential racks will always move at substantially the same speed during the greater part of its downward rack actuating movement, regardless of the load which the bail moves, the period of its operation or the distance through which it moves under said load. The speed at which the bail is driven under power is always greater than the speed at which it is moved downwardly under minimum load by the spring so that the bail, except at the beginning and end of its downward movement, is positively driven.

The mechanism for driving continuously the toothed wheel or roll 22 comprises a gear |82 secured, as by riveting, to the boss |23 and meshing with a gear |94 journaled on a stud |86 secured in one of the side plates 56 of the carriage. This gear meshes with a gear |83 fixed to the uted shaft 24. To the uted shaft is attached a pulley 208 connected by a belt 202 with a pulley 284 journaled on a hollow bearing secured to a bracket 288 attached to the frame of the carriage. This pulley is provided with a square opening in which fits a square shaft 208 rotatably supported at its ends upon suitable bearings carried by the line space frame, one of which is indicated at 2|8 in Fig. l, the pulley being slidable longitudinally of the shaft. The other end of the shaft 288 is supported by and connected for rotation with a pulley 2|2 journaled on a bushing supported on the frame and connected by a belt 2|4 with a pulley 2|8 fixed to a. shaft 2|8 mounted in bearings on. the line space frame. To the shaft 2| 8 is attached a gear 226 meshing with a gear 222 journaled on a shaft 224 secured at its ends to the line space frame. To the gear 222 is attached a pulley 226 connected by a belt 228 with a pulley 236 fixed to the shaft 232 of a suitable electric motor 234.

The driving connections above described between the motor 234 and the uted shaft 24 have substantially'the same construction, arrangement and mode of operation as the driving connections between the motor and the corresponding fluted shaft shown and described in applicants application Serial No. 281,772, except that, in the present construction, there is no provision for driving thesquare shaft 208 at variable speeds from thershaft 2| 8. The sliding connection between the pulley 204 and the square shaft 208 maintaifns a driving connection between these parts while allowing the letter spacing and return movementsYo-f the carriage.

Having explained the nature and object of the invention and having specifically described a construction embodying lthe invention in its preferred `form, what is claimed is:

1,. An accounting machine comprising power means, a register, selectively operative mechanisms for entering numbers, digit by digit, in the register each including a. diierential actuator, mechanism driven by the power means and normally disconnected from the actuator, means for connecting the actuator with said mechanism to movethe actuator in one direction, a device movable in'V a corresponding direction, mechanism for operatively connecting said device with the actuator to move the device in said direction from the actuator during the said movement thereof, means for operatively connecting diierentially said device with the register to operate the register during a part of the return movement of said device, means for returning said device comprising mechanism driven by the power means for imparting kthe .greater ,part of the return movement tosaid device and intermediate driving connections between the latter mechanism and said.device. Y Y

2.1An accounting machine .having power means, a register,l mechanisms arranged to be selectively thrown into operationV for entering numbers, denomination by denomination, in the register each comprising a differential actuator, mechanism driven by the power means and normally disconnected from the actuator, means for connecting the actuator with said mechanism to move the actuator in one direction, a device moved in a corresponding direction by the actuator during the said movement thereof, said device being then operatively disconnected from the register, means for returningsaid device comprising mechanism driven by the power means for imparting the greater part of the return movement tov said device, intermediate driving connections between said device and the latter mechanism and driving connections between said device andthe register arrangedwto be diierentially driven by said device, to actuate the register during return movement of said device.

3. An accounting machine comprising a totalizer, selectively operative mechanisms for entering numbers, digit by digit, in the totalizer each including a dilerential actuator, power driven mechanism normally disconnected from the actuator, means for connecting the actuators selectively with said mechanism to move the actuators in one direction, a device movable in a corresponding direction, mechanism for operatively connecting said device with the actuator to move the device in said direction from the actuator during the said movement thereof, means for operatively connecting said device differentially Lio with the register to operate the register during return movement of said device, means for returning said device comprising power driven mechanism for driving said device during the greater part of its return movement, intermediate driving connections between said power driven mechanism and said device and a spring for initiating the return movement of said device.

4. An accounting machine having power means, a totalizer, mechanisms for entering numbers, denomination by denomination, inthe register each comprising a diierential actuator, mechanism driven by the power means and normally disconnected from the actuators, means for connecting the actuators selectively with said mechanism to move the actuators in one direction, a device operated by the actuator during the said movement thereof, means for returning said device including mechanism driven by said power means for driving said device during the greater part of its return movement, a spring for initiating the return movement of said device, driving connections rendered operative by the initial return movement of said device for driving said device from said power driven means and driving connections between said device and the totalizer for actuating differentially the totalizer during return movementof said device.

5. An accounting machine Vcomprising power means, a register, mechanisms for entering numbers, digit by digit, in'therregister each including a differential actuator, mechanism driven by the power means and normally disconnected from the actuator, means for selectively connecting the actuators with said mechanism to move the actuators in one direction, a device movable in a corresponding direction, mechanism for operatively connecting said device with the actuator to move the device from the actuator during the said movement thereof, means for difierentially connecting said device with the register during the return movement of said device to actuate the register, means for returning said device including power operated mechanism for imparting a part Vof theV return movement to said device normally disconnected from said 'device driving connections between the latter vmechanism and said device, means for actuating said driving connections to connect said device with said mechanism during the greater part of the return Ymovement of said device,and mechanism for'actuating said driving connections to dis- 'connect said device from saidlmechanism as said device approaches theend of its return move'- ment.

6. An accounting machine having power means, a totalizer, selectively operative mechanisms -for entering numbers, digit by digit, in the register each comprising a diiferential actuator, mecha'- nism driven by the power means and normally disconnected from the actuator, means for connecting the actuator with said mechanism to move the actuator in one direction, a device moved'by the'actuator during they said movement thereof, means for returning said device comprising power 'driven mechanism for driving said device'during the greater part of its return movement, driving connections between said power driven means and said device, spring means for initiating the return movement of said device, mechanism operated by said 'initial return movementorc said device for actuating said driving connections to connect said device with said power driven means, means for actuating said driving Connections to disconnect said device from the power driven means as said device Vapproaches :the end of its return movement and mechanism driven dierentially by said device during its return movement for actuating the tota-liner.

7. An accounting machine comprising power means, a register, mechanisms for entering numbers, digit by digit, in the register each comprising a differential actuator, power operated vmechanism normally disconnected from the actuator, means for selectively connecting the actuators with said mechanism to move the actuators in one direction, a device moved with an actuator during the said movement thereof and operatively connected with the register during return movement of said device to actuate the register, means for returning said device comprising mechanism driven by the power means and normally disconnected from said device, driving connections between said device and the latter mechanism, means for actuating and controlling said driving connections to connect s id device with said mechanism during the greater part of the return movement of said device to impart return movement thereto, mechanism for actuating said driving connections to disconnect said device from said power driven mechanism as the device approaches the end of its return movement, a normally substantially inactive spring actuated element rendered operative as said device approaches the end of its return movement for imparting the final return movement to said device and driving connections for driving differentially the register from said device. 8. An accounting machine having power means, a totalizer, selectively operative mechanisms for entering numbers, denomination by denomination, in the totalizer comprising a differential actuator, mechanism driven by the power means and normally disconnected from the actuator, means for connecting the actuator with said mechanism to move the actuator in one direotion, a transversely extending bail common to all the actuators and actuated by each actuator during the movement of the actuator in said direction, means for returning the bail comprising mechanism operated by the power means for moving the bail in the opposite direction, driving connections between said power operated mechanism andthe bail for imparting the greater part of the latter movement to the bail and driving connections between the bail and the totalizer for actuating differentially the totalizer from the bail during return movement of the bail.

9. An accounting machine comprising power means, a register. mechanisms for entering numbers, digit by digit. in the register each including a diiferential actuator, mechanism driven by the power means and normaily disconnected from the actuator, means for selectively connecting the actuators with said mechanism to move the actuators in one direction, a device movable in a corresponding direction mechanism for operatively connecting said device with the actuator to move the device in said direction from the actuator during the .said movement thereof, means for returning said device comprising a pawl pivotally connected to the said device, a toothed wheel driven by the power means and arranged to be engaged by said pawl, means for swinging said pawl to engage said wheel during the initial return movement of said device to drivably connect the device and wheel and thereby cause said wheel to impart the greater part of the return movement to said device, mechanism operated differentially by said device during its return movement to actuate differentially the register, and means for swinging the pawl in the opposite direction to disengage said wheel as said device approaches the end of its return movement.

l0. An accounting machine having power means, a register, mechanisms arranged to be selectively operated for entering numbers, digit by digit, in the register each comprising a differential actuator, mechanism driven by the power means and normally disconnected from the actuator, means for selectively connecting the actuators with said mechanism to move the actuators in one direction, a device moved by an actuator during the movement thereof in said direction, means for returning said device including a pawl pivotally connected to the said device, a toothed wheel driven by the power means and arranged to be engaged by said pawl to drivably connect lsaid device and said wheel to cause the wheel to impart the greater part of the return movement to said device, and mechanism differentially actuated by said device for actuating the register during return movement of said device.

1l. An accounting machine having power means, a totalizer, mechanisms for entering numbers denomination by denomination, in the totalizer each comprising a differential actuator, mechanism driven by the power means and normally disconnected from the actuator, means for selectively connecting the actuators with said mechanism to move the actuators respectively in one direction, a device movable in a corresponding direction, mechanism for operatively connecting said device with an actuator to move the device in said direction from the actuator during the said movement thereof, means for returning said device including a pawl pivotally connected with said device, a toothed wheel driven by the power means and arranged to be engaged by said pawl, friction means for swinging said pawl to engage said wheel during the initial part of the return movement of said device to drivably connect said device and said wheel to impart the greater part of the return movement to said device, and means differentially actuated by said device for operating differentially the register.

12. An accounting machine comprising power means, a register, selectively operative mechanisrns for entering numbers, digit by digit, in the register each including a differential actuator, mechanism driven by the power means and normally disconnected from the actuator, means for connecting the actuator with said mechanism to move the actuator in one direction, a device movable in a corresponding direction, mechanism for operatively connecting said device with the actuator to move the said device in said direction from the actuator during the said movement thereof, means for returning said device including a pawl pivotally connected with said device, a toothed wheel continuously driven from the power means and arranged to be engaged by said pawl, means for swinging said pawl to engage said wheel during the initial part of the return movement of said device to drivably connect the device and said wheel to impart the greater part of the return movement t0 said device, throw out means on said device for actuating said pawl to disengage the same from said wheel as said device approaches the end of its return movement and means dierentially actuated by said device for actuating differentially the register from said device during return movement of said device.

13. An accounting machine having power means, a register, selectively operative mechanisms for entering numbers, digit by digit, in the register each comprising a diierential actuator, mechanism driven by the power means and normally disconnected from the actuator, means for connecting the actuator with said mechanism to move the actuator in one direction, a device moved in a corresponding direction by the actuator during the said movement thereof means for returning said device in the opposite direction comprising a pawl pivotally connected with Ysaid device, a toothed wheel constantly driven by the power means and arranged to be engaged by said pawl to drivably connect the device with said wheel to impart the greater part of the return movement to said device, frictionally acting means for swinging the pawl to engage said wheel during the initial movement of said device in a return direction and for maintaining the pawl out of engagement with the wheel during the movement of said device in the rst direction and means differentially operated by said device during its return movement for diierentially operating the register.

14. An accounting machine comprising power means, a register, selectively operative mechanisms for entering numbers, digit by digit, in the register each including a differential actuator, mechanism driven by the power means and normally disconnected from the actuator, means for connecting the actuator with said mechanism to move the actuator in one direction, a device movedvin a corresponding direction by the actuator during the said movement thereof, means for returning said device comprising mechanism driven by the power means for imparting the greater part of the return movement to said device, intermediate driving connections between said mechanism and said device, means for disconnecting said power driven mechanism from said device as the device approaches the end of its return movement, a normally substantially inactive spring operated element rendered operative substantially as said device approaches the end of its return movement for imparting the inal return movement to said device and mechanism diierentially actuated by said device, for actuating diierentially the register during return movement of said device.

15. An accounting machine comprising power means, a register, selectively operative mechanisms fc-r entering numbers, digit by digit, in the register each including a differential actuator, mechanism driven by the power means and normally disconnected from the actuator, means for connecting the actuator with said mechanism to move the actuator in one direction, a device i movable in a corresponding direction, mecha- 

